CIA Worldfact Book vs. Adherants

            The five major religions in the world are Christian, Islam, Hinduism, Judaism and Buddhism. According to the CIA Worldfact Book, Christians sit at 31.4%, Islamic (Muslim) 23.2%, Hindu 15%, Buddhist 7.1% and Judaism (Jewish) is 0.2%. When these numbers are compared to the data that Adherents.com provides, most numbers are fairly close. On this website, Christians are 33%, Islamic 21%, Hindu 14%, Buddhist 6% and Jewish 0.22%. All of these numbers slightly differ from one another but none of them are dramatically off from one another. The biggest difference is between Muslims and it is only a 1.8% decline which is not terrible. Within the next few years these numbers will continue to change which will be very interesting to see.